JP2012031973A - Meshing-chain type advancing/retracting actuation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a meshing-chain type advancing/retracting actuation apparatus which secures a housing space of a meshing-chain in a limited area in a plate surface of a chain housing guide plate and which avoids increases in vibration, fluttering and contact noise of the meshing-chain.SOLUTION: Differential coefficients of an meshing-chain advancing edge side curved guide part 141b and an meshing-chain retracting edge side curved guide part 141d are set to approximate zero at connection parts Pab and Pde, and curvatures of the meshing-chain advancing edge side curved guide part 141b and the meshing-chain retracting edge side curved guide part 141d coincide with the curvature of a circular-arcuate guide part 141c at the connection parts Pab and Pde.

Description

  The present invention relates to a meshing chain type advance / retreat operation device that is used for manufacturing equipment in various manufacturing fields, transport equipment in the transport field, nursing care equipment in the medical and welfare field, stage equipment in the art field, etc. .

2. Description of the Related Art Conventionally, as a meshing chain type advance / retreat operation device, there is a pair of meshing chains that are meshed with each other and driven integrally, that is, a meshing chain type lifting device that moves a driven object such as a heavy object using a chuck chain. (For example, refer to Patent Document 1).
The meshing chain used in such a conventional meshing chain type lifting device is driven by a driving sprocket that contacts a roller between a pair of left and right external plates when the meshing chain is driven, and has a linear guide portion and a circle. In some cases, the guide is retractable and retractable in a chain storage guide formed by connecting arc-shaped guide portions.
In addition, there is a chain guide provided with a chain running surface having a curved shape (for example, see Patent Document 2).

JP 2009-263047 A (refer to claims, FIG. 6). Japanese Patent Laying-Open No. 2007-64369 (refer to claims, FIG. 2)

However, in the conventional meshing chain lifting apparatus 200, as shown in FIGS. 10 to 12, the meshing chain entry end side linear guide part 241a and the arcuate guide part 241c constituting a part of the chain storage guide 241 are illustrated. The connecting points Pac shown in the middle points are directly connected to each other, and the tension of the meshing chain 210 in the chain storage guide 241 does not act, so that the curvature of the chain storage guide 241 on which the meshing chain 210 travels is changed. Therefore, the chain storage guide 241 is provided in a limited area in the plate surface of the chain storage guide plate 240 because the mesh chain 210 is prevented from smoothly running from 0 to 1 / R. To increase the storage space for the meshing chain 210 and to store the meshing chain 210 Vibration of definitive engagement chain 210, there is a problem that is possible to avoid an increase of fluttering and contact noise becomes difficult.
In addition, the same problem as that of the connecting portion Pac occurs in the connecting portion Pce that connects the meshing chain retracting end side linear guide portion 241e and the arcuate guide portion 241c to each other.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to increase the storage space of the meshing chain in the limited plate in-plane region of the chain storage guide plate and to vibrate, flutter and contact the meshing chain. It is an object of the present invention to provide a meshing chain type advance / retreat operation device that avoids an increase in noise.

  First, the meshing chain type advance / retreat operation device according to the first aspect of the present invention includes a pair of meshing chains that are rigidly integrated with each other in a state of being meshed with each other and opposed to each other, and that can be separated from each other to be freely branched. A driving sprocket for driving the chain, a conveyance support attached to one end of the meshing chain and driven to advance and retreat in accordance with the advancement and retraction of the meshing chain, and a meshing chain branched off from the driving sprocket. A chain storage guide plate having a pair of meshing chain storage guides that can be retracted and retracted, wherein the chain storage guide forms an arcuate guide portion that constitutes a part of the chain storage guide, and the meshing chain of the arcuate guide portion The engagement chain entry end side linear guide portions formed on the entry end side are connected to each other to connect the engagement chain. A meshing chain entry end side curved guide portion that guides the meshing chain that has entered the linear entry end side linear guide portion from the meshing chain entry end side linear guide portion to the arcuate guide portion, and the arcuate guide portion and the circle The arcuate guide part is connected to the receding end side linear guide part formed on the mating chain exit end side of the arcuate guide part, and the meshing chain exiting from the arcuate guide part is connected to the receding end side linear form from the arcuate guide part. A curved guide portion on the meshing chain exit end side that guides to the guide portion, and the curvature of the curved guide portion on the meshing chain entry end side makes the curved guide portion on the meshing chain entry end side and the arcuate guide portion cross each other. The connecting portion connected to the arcuate guide portion has the same curvature as that of the arcuate guide portion. The joint approach end side curved guide portion and the meshing chain entry end side linear guide portion are set to be close to zero at the connecting portion connecting each other, and the curvature of the meshing chain exit end side curved guide portion is The connecting portion connecting the meshing chain exit end side curved guide portion and the arcuate guide portion agrees with the curvature of the arcuate guide portion, and the differential coefficient of the meshing chain exit end side curved guide portion is The above-described problem is solved by setting the meshing chain retracting end side curved guide portion and the meshing chain retracting end side linear guide portion to be close to zero at a connecting portion that mutually connects.

  The invention according to claim 2 is the meshing chain type advance / retreat operation device according to claim 1, wherein curvatures of the meshing chain entry end side curved guide portion and the meshing chain exit end side curved guide portion are determined by the engagement of the meshing type. The above-described problems are further solved by being defined by mutually different curves indicating different curvatures with respect to the moving distance of the disengaged meshing chain.

  A meshing chain type advance / retreat operation device according to claim 1 of the present invention includes a pair of meshing chains which are stiffened integrally in a state where they are meshed with each other and arranged to face each other, and which can be separated from each other to be branched, and this meshing chain. The drive sprocket to be driven, the carrier support part that is attached to one end of the meshing chain and driven to advance and retreat in accordance with the forward and backward movement of the meshing chain, and the meshing chain that has been separated from the drive sprocket and branched are housed in a retractable manner. And a chain storage guide plate having a pair of meshing chain storage guides, so that the transported object supported by the transported object support portion can be transported according to the forward and backward movement of the meshing chain, and the following The special effect corresponding to such a peculiar composition can be produced.

  That is, in the meshing chain type advance / retreat operation device according to the first aspect, the chain storage guide is formed on an arcuate guide portion constituting a part of the chain storage guide and on the meshing chain entry end side of the arcuate guide portion. The meshing chain that connects the meshing chain entry end side linear guide portion to each other and guides the meshing chain that has entered the meshing chain entry end side linear guide portion from the meshing chain entry end side linear guide portion to the arcuate guide portion. The entrance end side curved guide portion and the arcuate guide portion and the exit end side linear guide portion formed on the exit end side of the arcuate guide portion of the arcuate guide are connected to each other, and the engagement is retracted from the arcuate guide portion. And a meshing chain exit end side curved guide portion for guiding the chain from the arcuate guide portion to the meshing chain exit end side linear guide portion. The curvature of the curved guide portion on the meshing chain entry end side coincides with the curvature of the arcuate guide portion at the connecting portion that connects the curved guide portion on the meshing chain entry end side and the arcuate guide portion, and the meshing chain entry end. The differential coefficient of the side curved guide portion is set close to zero at the connecting portion connecting the meshing chain entry end side curved guide portion and the meshing chain entry end side linear guide portion to each other, and the meshing chain exit end side The curvature of the curved guide portion coincides with the curvature of the arcuate guide portion at the connecting portion that connects the curved guide portion and the arcuate guide portion to each other, and the meshed chain exit end side curved guide portion. Is set to be close to zero at the connecting portion connecting the meshing chain exit end side curved guide portion and the meshing chain exit end side linear guide portion to each other. And a mesh guide comprising an engagement chain entry end side linear guide portion, an engagement chain entry end side curved guide portion, an arcuate guide portion, an engagement chain exit end side curved guide portion, and an engagement chain exit end side linear guide portion. Since the chain track is configured as a continuously and smoothly linked track, the chain storage space is gained in a limited area within the plate surface of the chain storage guide plate, and the vibration, fluttering and contact noise of the mesh chain increase. Can be avoided.

  The meshing chain type advance / retreat operation device according to claim 2 has, in addition to the effect exerted by the meshing chain type advance / retreat operation device according to claim 1, a meshing chain entry end side curved guide portion and a meshing chain exit end side curve. Vibrations of the meshing chain formed by superimposing a plurality of frequency components, wherein the curvature of the guide part is respectively defined by different curves indicating different curvatures with respect to the moving distance of the meshed meshing chain, Since the fluttering and contact noise are reduced for each frequency component according to the respective curvatures of the meshing chain entry end side curved guide portion and the meshing chain exit end side curved guide portion, the meshing chain entry end side curved guide portion. Compared to the case where the curved guide portions at the exit end side of the meshing chain are defined by curves showing the same curvature change. Vibration of engagement chains, an increase in the flapping and contact noise can be further avoided.

The front view of the meshing chain type advance / retreat operation apparatus which is an Example of this invention. The perspective view which shows the decomposition | disassembly assembly state of a meshing chain. FIG. 3 is a schematic plan view schematically showing a chain storage guide. A schematic plan view schematically showing a part of a chain storage guide. The graph which showed the curve which prescribes | regulates the curvature of a curved guide part. The graph which showed an example of the curvature of a chain storage guide. The graph which showed an example of the curvature of a chain storage guide. The graph which showed an example of the curvature of a chain storage guide. The graph which showed an example of the curvature of a chain storage guide. The front view of the meshing chain type advance / retreat operation device which is a comparative example. The schematic top view which showed a part of chain storage guide in a comparative example typically. The graph which showed the curvature change of the chain storage guide in a comparative example.

The meshing chain type advance / retreat operation device of the present invention meshes with a pair of meshing chains that are rigidly integrated with each other in a state where they are meshed with each other and are disengaged from each other and can be branched, and a drive sprocket that drives the meshing chain. A pair of meshing chain storage guides that can be retracted into and retracted from a carrier support part that is attached to one end of the chain and is driven to advance and retreat in accordance with the advancing and retreating operation of the meshing chain, and a meshing chain that is disengaged from the drive sprocket. A chain storage guide plate having an arcuate guide portion forming a part of the chain storage guide and a meshing chain entry end side straight line formed on the meshing chain entry end side of the arcuate guide portion. Connected to each other and the meshes entering the linear guide portion on the meshing chain entry end side. A curved guide part on the meshing chain entry end side for guiding the chain from the linear guide part on the meshing chain entry end side to the arcuate guide part, and an exit formed on the meshing chain exit end side of the arcuate guide part and the arcuate guide part An interlocking chain exit end side curved guide portion that connects the end side linear guide portion to each other and guides the meshing chain that has exited from the arcuate guide portion from the arcuate guide portion to the engagement chain exit end side linear guide portion; The curvature of the curved guide portion on the meshing chain entry end side coincides with the curvature of the arcuate guide portion at the connecting portion that connects the curved guide portion on the meshing chain entry end side and the arcuate guide portion. The differential coefficient of the chain entry end side curved guide portion is such that the engagement chain entry end side curved guide portion and the engagement chain entry end side linear guide portion are It is set close to zero at the connecting part that connects to each other, and the curvature of the curved guide part on the meshing chain exit end side is the connecting part that connects the curved guide part and the arcuate guide part on the meshing chain exit end side. A connection that matches the curvature of the arcuate guide part and the differential coefficient of the curved guide part on the meshing chain exit end side connects the curved guide part on the meshing chain exit end side and the linear guide part on the meshing chain exit end side to each other Any specific embodiment may be used as long as it is set close to zero in the unit.
For example, the curve defining the curvature of the meshing chain entry end side curved guide portion and the meshing chain exit end side curved guide portion is a clothoid curve, a cubic curve, or a phase of -π / 2 to 2 among sine wave shapes. It may be a curve such as a sine half-wavelength decreasing curve that is a portion of π / 2.

  Regarding specific shapes of plates such as the internal tooth plate and the external tooth plate used in the meshing chain type advance / retreat operation device of the present invention, the same type of plates facing each other are meshed together to be integrated, and each is separated from each other and branched. Any shape can be used as long as it does.

  Further, in the meshing chain type advance / retreat operation device of the present invention, the chain storage guide has a plurality of arcuate guide portions and has a shape wound a plurality of times in the plate in-plane region of the chain storage plate, and each circle. On the respective sides of the arcuate guide portion on the meshing chain entry end side and the meshing chain withdrawal end side, the meshing chain entry end side curved guide portion, the meshing chain entry end side linear guide portion, the meshing chain exit end side curved guide portion, The meshing chain withdrawal end side linear guide portion may be formed.

  Also, the length of the curved guide portion on the meshing chain entry end side and the curved guide portion on the meshing chain exit end side is set to be longer than the plate pitch of the internal tooth plate and the external tooth plate along the chain longitudinal direction. It is more preferable for further avoiding the meshing chain vibration, fluttering and contact noise.

  Further, the meshing chain type advance / retreat operation device of the present invention has no problem in the advance / retreat operation even if the installation surface is a floor surface in a stationary installation form or a ceiling surface in a suspended installation form. Even if it is a vertical wall surface in a cantilever support form, there is no problem in the above-described advance / retreat operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An interlocking chain type advance / retreat operation device 100 according to an embodiment of the present invention will be described below with reference to FIGS.
Here, FIG. 1 is a front view of a meshing chain type advance / retreat operation device according to an embodiment of the present invention, FIG. 2 is a perspective view showing an exploded assembly state of the meshing chain, and FIG. 3 is a chain storage guide. FIG. 4 is a schematic plan view schematically showing a part of the chain storage guide, and FIG. 5 is a curve that defines the curvature of the curved guide portion. FIG. 6, FIG. 7, FIG. 8, and FIG. 9 are graphs showing an example of the curvature of the chain storage guide.

  First, as shown in FIG. 1, the meshing chain type advance / retreat operation device 100 of the present embodiment is a pair of meshing chains that are rigidly integrated with each other in a state of being meshed with each other and opposed to each other, and can be separated from each other and branched. 110, 110, the drive sprocket 120 that drives the meshing chain 110, and the carrier support 130 that is attached to one end of the meshing chain 110 and is driven forward and backward according to the forward and backward movement of the meshing chain 110 and the drive sprocket 120. A chain storage guide plate 140 having a pair of meshing chain storage guides 141 for retracting and retracting each of the branched meshing chains 110 is provided as a basic device configuration, and is installed in a stationary state on the installation surface G. A transport object support 110 for mounting a transport object (not shown) such as an object is provided on the installation surface G. It is intended to parallel lifting against.

  That is, in the meshing chain type lifting device 100 of the first embodiment, as shown in FIGS. 1 and 2, a pair of meshing chains 110, 110 are connected to an internal tooth plate 111 having a hook shape and the internal tooth plate 111. On the other hand, the outer tooth plate 112 and the outer tooth plate 111 having a hook shape are overlapped with each other by being shifted by a half pitch in the longitudinal direction of the chain and are fixedly connected to the bush 113 and the outer tooth plate 112 in the chain width direction. The connecting pins 114 are connected to each other on the installation surface G and are rigidly integrated with each other while being opposed to each other. The conveyed object is raised and lowered according to the raising and lowering operation.

Next, a specific form of the chain storage guide 141, which is the most characteristic of the above-described meshing chain type advance / retreat differential device 100 of this embodiment, will be described in detail with reference to FIGS.
As shown in FIG. 3, in the meshing chain type advance / retreat operation device 100 according to the embodiment, the chain storage guide 141 is engaged with an arcuate guide portion 141c constituting a part of the chain storage guide 141 and the arcuate guide portion 141c. The meshing chain entry end side linear guide 141a connected to the meshing chain entry end side linear guide portion 141a formed on the chain entry end side is connected to the meshing chain entry end side linear guide portion 141a. The engagement chain entry end side curved guide portion 141b that guides from the portion 141a to the arcuate guide portion 141c, and the exit end side linear guide formed on the engagement chain exit end side of the arcuate guide portion 141c and the arcuate guide portion 141c. The meshing chain that is connected to the portion 141d and exits from the arcuate guide portion 141c. And an engagement chain retracting end side curved guide portion 141d for guiding the guide 110 from the arcuate guide portion 141c to the engagement chain retracting end side linear guide portion 141e, and the curvature of the engagement chain entering end side curved guide portion 141b is The connecting portion Pbc connecting the meshing chain entry end side curved guide portion 141b and the arcuate guide portion 141c agrees with the curvature of the arcuate guide portion 141c, and the differential coefficient of the meshing chain entry end side curved guide portion 141b. Is set close to zero at the connecting portion Pab connecting the meshing chain entry end side curved guide portion 141b and the meshing chain entry end side linear guide portion 141a, and the meshing chain exit end side curved guide portion 141d. Are curved guide portions 141d and the arcuate guide portions 14 on the exit side of the meshing chain. and the connecting portion Pcd that connects to each other coincides with the curvature of the arcuate guide portion 141c, and the differential coefficient of the meshing chain exit end side curved guide portion 141d is the meshing chain exit end side curved guide portion 141d and the meshing chain. By being set close to zero at the connecting portion Pde connecting the withdrawal end side linear guide portion 141e to each other, the meshing chain entry end side linear guide portion 141a and the meshing chain entry end side curved guide portion 141b are set. Since the raceway of the meshing chain 110 including the arcuate guide portion 141c, the meshing chain withdrawal end side curved guide portion 141d, and the meshing chain withdrawal end side linear guide portion 141e is configured as a continuously and smoothly connected raceway, The meshing chain 110 is placed in a limited plate surface area of the chain storage guide plate 140. The storage space is increased, and an increase in vibration, fluttering and contact noise of the meshing chain 110 is avoided.

Here, a curve defining the curvature of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d, the meshing chain entry end side linear guide portion 141a, and the meshing chain entry end side curved shape. The curvature of the guide portion 141b, the arcuate guide portion 141c, the meshing chain retracting end side curved guide portion 141d, and the meshing chain retracting end side linear guide portion 141e with respect to the chain moving distance will be specifically described.
6 to 9 referred to below, an arbitrary portion of the meshing chain entry end side linear guide portion 141a is set as a reference point 0, and is shown in a dotted shape on the chain moving distance L taken on the horizontal axis. The connection parts Pab, Pbc, Pcd and Pde are plotted.

Based on FIG. 5 and FIG. 6, the case where the curves defining the curvature of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are clothoid curves will be described.
As shown in FIGS. 5 and 6, the differential coefficients of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are set close to zero at the connection portions Pab and Pde. Since the curvatures of the engagement chain entry end side curved guide portion 141b and the engagement chain exit end side curved guide portion 141d coincide with the curvature of the arcuate guide portion 141c at the connection portions Pbc and Pcd, the chain storage guide 141 is provided. Since the entire chain track structure is continuously smooth, the chain storage guide 141 gains storage space for the meshing chain 110 in the limited plate in-plane region of the chain storage guide plate 140, and the vibration and fluttering of the meshing chain 110 are caused. In addition, an increase in contact noise is avoided.

Next, based on FIG. 5 and FIG. 7, a case where the curves defining the curvatures of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are cubic curves will be described.
As shown in FIGS. 5 and 7, the differential coefficients of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are set closer to zero at the connection portions Pab and Pde. In addition, the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are connected more smoothly by matching the curvature of the arcuate guide portion 141c with the connection portions Pbc and Pcd. As a result, the entire chain storage guide 141 continuously forms a smoother chain track as compared with the case where a clothoid curve is adopted, so that the chain storage guide 141 has a limited plate surface of the chain storage guide plate 140. Earn storage space for the mesh chain 110 in the inner area and mesh Vibration of over emissions 110, so as to further avoid an increase in flapping and contact noise.

Next, based on FIGS. 5 and 8, a case where the curves defining the curvatures of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are sine half-wavelength decreasing curves will be described. To do.
As shown in FIGS. 5 and 8, the differential coefficients of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are set to zero at the connection portions Pab and Pde, and the meshing is performed. The chain entrance end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are connected more smoothly by matching the curvature of the arcuate guide portion 141c with the connecting portions Pbc and Pcd. Compared with the case where a clothoid curve and a cubic curve are adopted, the entire chain storage guide 141 continuously forms a smoother chain path, so that the chain storage guide 141 has a limited plate surface of the chain storage guide plate 140. Earn storage space for the mesh chain 110 in the inner area and mesh Vibration of over down 110, and further adapted to further avoid an increase in flapping and contact noise.

Next, based on FIG. 5 and FIG. 9, the curves defining the curvature of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d are the chain movements of the meshing chain 110 that has been disengaged. The case where it is prescribed | regulated by the mutually different curve which shows a mutually different curvature with respect to the distance L is demonstrated.
As shown in FIGS. 5 and 9, the curvature of each of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d, that is, between the connection portions Pab to Pbc and the connection portions Pcd to Pde. The respective vibrations of the meshing chain 110 formed by superimposing a plurality of frequency components are defined by mutually different curves indicating different curvatures with respect to the chain movement distance L of the meshed meshing chain 110 that is disengaged. The flutter and contact noise are reduced for each frequency component according to the respective curvatures of the meshing chain entry end side curved guide portion 141b and the meshing chain exit end side curved guide portion 141d. Engagement chain entry end side curved guide portion 141b and engagement chain retracting End side curved guide portion 141d is adapted to further avoid an increase in vibrations, flutter and contact noise engagement chain 110 as compared with the case where as specified by the curve showing the same curvature to each other.

  The meshing chain type advance / retreat operation device 100 of the present embodiment obtained in this way is a pair of meshing chains 110 that are stiffened integrally in a state where they are meshed with each other and arranged opposite to each other, and are meshed with each other so that they can be branched. 110, a driving sprocket 120 that drives the meshing chain 110, and a carrier support 130 that is attached to one end of the meshing chain 110 and is driven forward and backward in accordance with the forward and backward movement of the meshing chain 110 and the driving sprocket 120, and is branched. A chain storage guide plate 140 having a pair of meshing chain storage guides 141 for retracting and retracting the meshing chain 110 that can be moved in and out, and the chain storage guide 141 is an arcuate guide portion that constitutes a part of the chain storage guide 141. 141c and the circular arc guide portion 141c meshing check The meshing chain entry end side linear guide 141a is connected to the meshing chain entry end side linear guide portion 141a and connected to the meshing chain entry end side linear guide portion 141a. The engagement chain entry end side curved guide portion 141b that guides from the portion 141a to the arcuate guide portion 141c, and the exit end side linear guide formed on the engagement chain exit end side of the arcuate guide portion 141c and the arcuate guide portion 141c. The interlocking chain exit end side curved guide portion 141d that connects the portion 141d to each other and guides the interlocking chain 110 that has retracted from the arcuate guide portion 141c from the arcuate guide portion 141c to the interlocking chain exit end side linear guide portion 141e. And the meshing chain entry end side curved guide portion 141. Of the meshing chain entry end side curved guide portion 141b and the arcuate guide portion 141c are connected to each other at the connecting portion Pbc, and the curvature of the arcuate guide portion 141c is matched. The differential coefficient of 141b is set close to zero at the connecting portion Pab connecting the meshing chain entry end side curved guide portion 141b and the meshing chain entry end side linear guide portion 141a to each other, and the meshing chain exit end side curvature is set. The curvature of the guide portion 141d coincides with the curvature of the arcuate guide portion 141c at the connecting portion Pcd connecting the curved guide portion 141d and the arcuate guide portion 141c to each other. The differential coefficient of the curved guide portion 141d is such that the engagement chain retracting end side curved guide portion 141d and the engagement chain By setting it close to zero at the connecting portion Pde that connects the receding end side linear guide portion 141e to each other, the storage space of the meshing chain 110 is limited in the limited plate in-plane region of the chain storage guide plate 140. The effect is enormous, such as being able to earn and avoid an increase in vibration, fluttering and contact noise of the meshing chain 110.

DESCRIPTION OF SYMBOLS 100 ... Engagement chain type advance / retreat operation device 110, 210 ... Engagement chain 111 ... Inner tooth plate 112 ... Outer tooth plate 113 ... Bush 114 ... Connection pin 120, 220 ... Drive Sprocket 130, 230 ... Conveyed object support part 140, 240 ... Chain storage guide plate 141, 241 ... Chain storage guide 141a, 241a ... Meshing chain entry end side linear guide part 141b ... Meshing Chain entrance end side curved guide portion 141c, 241c ... Arc guide portion 141d ... Engagement chain exit end side curved guide portion 141e, 241e ... Engagement chain exit end side linear guide portion 200 ... Meshing chain type lifting device G ... Installation surface L ... Cha Curvature of the moving distance R · · · arc-shaped guide portion radius

Claims (2)

A pair of meshing chains that are stiffened together in a state where they are meshed with each other and are opposed to each other, and that can be separated by being meshed with each other, a driving sprocket that drives the meshing chain, and one end of the meshing chain are meshed. A carrier support portion that is driven to advance and retreat in accordance with the advancing and retreating operation of the chain, and a chain storage guide plate having a pair of meshing chain storage guides for retractably storing the meshing chains that are branched off from the drive sprocket. An interlocking chain type advance / retreat operation device comprising:
The chain storage guide mutually connects an arcuate guide portion constituting a part of the chain storage guide and a meshing chain entry end side linear guide portion formed on the meshing chain entry end side of the arcuate guide portion. The meshing chain entry end side linear guide part that guides the meshing chain that has entered the meshing chain entry end side linear guide part from the meshing chain entry end side linear guide part to the arcuate guide part, and the arcuate guide And the retraction end side linear guide part formed on the retraction end side of the arcuate chain of the arcuate guide part are connected to each other, and the engagement chain retreating from the arcuate guide part is retreated from the arcuate guide part. An engagement chain exit end-side curved guide portion that guides to the end-side linear guide portion;
The curvature of the meshing chain entry end side curved guide portion is equal to the curvature of the arcuate guide portion at the connecting portion connecting the meshing chain entry end side curved guide portion and the arcuate guide portion to each other,
The differential coefficient of the meshing chain entry end side curved guide portion is set to be close to zero at the connection portion connecting the meshing chain entry end side curved guide portion and the meshing chain entry end side linear guide portion to each other. ,
The curvature of the meshing chain exit end side curved guide portion is equal to the curvature of the arcuate guide portion at the connecting portion connecting the meshing chain exit end side curved guide portion and the arcuate guide portion to each other,
The differential coefficient of the meshing chain exit end side curved guide portion is set to be close to zero at the connecting portion connecting the meshing chain exit end side curved guide portion and the meshing chain exit end side linear guide portion. An interlocking chain type advance / retreat operation device characterized by comprising:   Curvatures of the meshing chain entry end side curved guide portion and the meshing chain exit end side curved guide portion are respectively defined by mutually different curves showing different curvatures with respect to the moving distance of the meshing engagement chain. The interlocking chain type advance / retreat operation device according to claim 1, wherein

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